Doubly excited states of the hydrogen negative ion and helium atom in astrophysical plasmas

2013 ◽  
Vol 20 (1) ◽  
pp. 012126 ◽  
Author(s):  
Pinghui Jiang ◽  
Sabyasachi Kar ◽  
Y. Zhou
Keyword(s):  
Helium Atom ◽  
Excited States ◽  
Negative Ion ◽  
Astrophysical Plasmas ◽  
Doubly Excited States ◽  
Doubly Excited

scholarly journals Selective negative-ion formation from core-valence doubly excited states of the water molecule

2018 ◽  
Vol 98 (5) ◽  
Author(s):  
Christian Stråhlman ◽  
Bruno Moog ◽  
Emelie Ertan ◽  
Michael Odelius ◽  
Antti Kivimäki ◽  
...  
Keyword(s):  
Water Molecule ◽  
Excited States ◽  
Negative Ion ◽  
Doubly Excited States ◽  
Ion Formation ◽  
Doubly Excited

Signature of chaos in high-lying doubly excited states of the helium atom

2005 ◽  
Vol 72 (3) ◽  
Author(s):  
Anh-Thu Le ◽  
Toru Morishita ◽  
X.-M. Tong ◽  
C. D. Lin
Keyword(s):  
Helium Atom ◽  
Excited States ◽  
Doubly Excited States ◽  
Doubly Excited

Negative and Neutral Autoionizing States Detected in the Electroionization Curve in CO

1973 ◽  
Vol 51 (20) ◽  
pp. 2202-2208 ◽  
Author(s):  
R. Carbonneau ◽  
P. Marmet
Keyword(s):  
Excited States ◽  
Rydberg States ◽  
Negative Ion ◽  
Electron Transmission ◽  
Doubly Excited States ◽  
Doubly Excited ◽  
First Time ◽  
Autoionizing States

Negative ion resonances and neutral Rydberg states having the A2Π and B2Σ+ states of CO+ as limits are reported for the first time in the electroionization curve of CO. Moreover, new doubly excited states of CO are observed around 21 eV. The electroionization is compared with photoionization, photoabsorption, and electron transmission when data are available.

scholarly journals Resonances in Systems Involving Positrons

Atoms ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 20 ◽  
Author(s):  
Anand K. Bhatia
Keyword(s):  
Excited States ◽  
Cross Section ◽  
Incident Particle ◽  
Feshbach Resonances ◽  
Astrophysical Plasmas ◽  
Resonance Parameters ◽  
Doubly Excited States ◽  
Doubly Excited ◽  
The Cross ◽  
Shape Resonances

When an incident particle on a target gets attached to the target, the cross-section at that energy could be much larger compared to those at other energies. This is a short-lived state and decays by emitting an electron. Such states can also be formed by the absorption of a photon. Such states are below the higher thresholds and are called autoionization states, doubly excited states, or Feshbach resonances. There is also a possibility of such states to form above the thresholds. Then they are called shape resonances. Resonances are important in the diagnostic of solar and astrophysical plasmas. Some methods of calculating the resonance parameters are described and resonance parameters occurring in various systems are given.

Singly and doubly excited states of theD-dimensional helium atom

1999 ◽  
Vol 59 (1) ◽  
pp. 182-187 ◽  
Author(s):  
J. C. Carzoli ◽  
M. Dunn ◽  
D. K. Watson
Keyword(s):  
Helium Atom ◽  
Excited States ◽  
Doubly Excited States ◽  
Doubly Excited
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